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高速道路 터널區間에서의 運轉者 視覺情報 特性에 관한 硏究
金明洙,延基錫,姜宗實 大田産業大學校 2001 한밭대학교 논문집 Vol.18 No.-
It is very important to analyse drivers' visual behavior because visual information accounts for more than 90 percent of information for driving. There is a research that adjustment factor a tunnel is 0.95 and for a continuous tunnel is 0.09. The reason is that a vehicle slowed down for visual trouble in the tunnel section of highway. This problem usually happens but there has never been studied of human factor which is operated as causes. Therefore the importance of researches on stable driving, smooth travel and coping with traffic safety is increasing day by day. In this regard, this study has an eye to visual aspect among things which influence drives' activity.
( Ji Yeon Kim ),( Sungkyoung Choi ),( Taesung Park ),( Seul Ki Kim ),( Yoon Suk Jung ),( Jung Ho Park ),( Hong Joo Kim ),( Yong Kyun Cho ),( Chong Il Sohn ),( Woo Kyu Jeon ),( Byung Ik Kim ),( Kyu Yon 대한장연구학회 2019 Intestinal Research Vol.17 No.2
Background/Aims: Colorectal cancer incidence among patients aged ≤50 years is increasing. This study aimed to develop and validate an advanced colorectal neoplasm (ACRN) screening model for young adults aged <50 years in Korea. Methods: This retrospective cross-sectional study included 59,575 consecutive asymptomatic Koreans who underwent screening colonoscopy between 2003 and 2012 at a single comprehensive health care center. Young Adult Colorectal Screening (YCS) score was developed as an optimized risk stratification model for ACRN using multivariate analysis and was internally validated. The predictive power and diagnostic performance of YCS score was compared with those of Asia-Pacific Colorectal Screening (APCS) and Korean Colorectal Screening (KCS) scores. Results: 41,702 and 17,873 subjects were randomly allocated into the derivation and validation cohorts, respectively, by examination year. ACRN prevalence was 0.9% in both cohorts. YCS score comprised sex, age, alcohol, smoking, obesity, glucose metabolism abnormality, and family history of CRC, with score ranges of 0 to 10. In the validation cohort, ACRN prevalence was 0.6% in the low-risk tier (score, 0-4), 1.5% in the moderate-risk tier (score, 5-7), and 3.4% in the high-risk tier (score, 8-10). ACRN risk increased 2.5-fold (95% confidence interval [CI], 1.8-3.4) in the moderate-risk tier and 5.8-fold (95% CI, 3.4-9.8) in the high-risk tier compared with the low-risk tier. YCS score identified better balanced accuracy (53.9%) than APCS (51.5%) and KCS (50.7%) scores and had relatively good discriminative power (area under the curve=0.660). Conclusions: YCS score based on clinical and laboratory risk factors was clinically effective and beneficial for predicting ACRN risk and targeting screening colonoscopy in adults aged <50 years. (Intest Res 2019;17:253-264.)
석기태 ( Ki Tae Suk ),김현수 ( Hyun Soo Kim ),이진형 ( Jin Hyung Lee ),김보라 ( Bo Ra Kim ),김문영 ( Moon Young Kim ),김재우 ( Jae Woo Kim ),백순구 ( Soon Koo Baik ),권상옥 ( Sang Ok Kwon ),정요셉 ( Yosep Chong ),조미연 ( Mee Yon 대한장연구학회 2009 Intestinal Research Vol.7 No.1
Background/Aims: Microsatellite instability (MSI) is associated with mutations in the DNA mismatch repair system and accounts for 10-15% of all cases of sporadic colorectal cancer (CRC). However, the characteristics and role of MSI as a marker for predicting the prognosis and therapeutic effect on CRC remain unclear. Methods: Between June 2003 and December 2007, 259 patients (males, 159 [61%]; age, 63 [±11] years) who underwent surgery for CRC were retrospectively enrolled. The clinicopathologic characteristics of patients with high-frequency MSI (MSI-H) CRC were reviewed and compared to patients with low-frequency MSI or microsatellite stable CRC. The patient characteristics and MSI-related data were recorded for the following variables: gender, age, clinicopathologic findings, chemotherapy response, recurrence, and survival. Results: MSI-H CRC was diagnosed in 30 patients (12%), low-frequency MSI CRC was diagnosed in 10 patients (4%), and microsatellite stable CRC in was diagnosed in 219 patients (84%). The MSI-H group exhibited the following characteristics: large size, right colon location, positive response to chemotherapy, low recurrence, longer survival, less neural invasion, poor differentiation, diffuse lymphoid reaction, and mucin pool formation. However, in the chemotherapy group (n=180), MSI-H was not a marker of longer survival. Based on Cox-regression analysis, stage IV CRC (OR=6.66; 95% CI, 2.24-53.00), MSI-H (OR=0.17; 95% CI, 0.04-0.73), and a positive response to chemotherapy (OR=0.02; 95% CI, 0.01-0.11) were related to mortality. Conclusions: MSI-H CRC had less neural invasion and diffuse lymphoid reaction. Further studies regarding the relationship between those pathologic findings and survival are needed. (Intest Res 2009;7:14-21)
김종윤,엄효숙,김연희,김두한 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.4
Pigmeted spindle cell nevus (PSCN) is often interpreted as a Spitz nevus or misdiagnosed as a malignant melanoma. Some authors consider PSCN as a pigmented variant of Spitz nevus, but many dermatologists classify it as a separate disease. We report a case of pigmented spindle cell nevus which occurred in a 4-year-old boy. The lesion was a well-demarcated, 3×3㎜ sized, black macule on the dorswn part of the 4th finger, left hand. The histopathologic findings of the excisional biopsy specimen revealed the proliferation of uniform, spindle shaped, pigmented melanocytes at the dermoepidermal junction and sharply defined lateral margins. The pathologic features were consistent with PSCN. (Korean J Dermatol 2004;42(4):482~484)
An Empirical Study on the Wealth Effect
Kim, Yon Hyong,Chong, Young Suk 한국통계학회 2003 Communications for statistical applications and me Vol.10 No.1
The primary purpose of this paper is to estimate the wealth effect. We establish a linear relationships between household consumption, labor income, and stock price index. Each variable is nonstationary. And so, it contains a unit root. However, as the result of the test about cointegrating relations, the variables are cointegrated which implies the error term is stationary. The cointegrating parameter that the marginal propensity to consume out of stock price is 0.08%. The result of estimation shows the error correction is -0.62 and the significant level is also high. The error correction term indicates a rather rapid adjustment to deviations from the long run equilibrium relations.